﻿// Copyright (c) Argo Zhang (argo@163.com). All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
// Website: https://www.blazor.zone or https://argozhang.github.io/

using BootstrapBlazor.Components;
using Microsoft.AspNetCore.Components;
using Microsoft.Extensions.Localization;
using Microsoft.Extensions.Options;
using Microsoft.JSInterop;
using System;
using System.Diagnostics.CodeAnalysis;
using System.Globalization;
using System.Threading.Tasks;

namespace BootstrapBlazor.Shared.Pages.Components
{
    /// <summary>
    /// 
    /// </summary>
    public partial class CultureChooser
    {
        [Inject]
        [NotNull]
        private IOptions<BootstrapBlazorOptions>? BootstrapOptions { get; set; }

        [Inject]
        [NotNull]
        private IStringLocalizer<CultureChooser>? Localizer { get; set; }

        [Inject]
        [NotNull]
        private NavigationManager? NavigationManager { get; set; }

        private string? ClassString => CssBuilder.Default("culture-selector")
            .AddClassFromAttributes(AdditionalAttributes)
            .Build();

        private string SelectedCulture { get; set; } = CultureInfo.CurrentUICulture.Name;

        [NotNull]
        private string? Label { get; set; }

        /// <summary>
        /// OnInitialized 方法
        /// </summary>
        protected override void OnInitialized()
        {
            base.OnInitialized();

            Label ??= Localizer[nameof(Label)];
        }

        private async Task SetCulture(SelectedItem item)
        {
            if (OperatingSystem.IsBrowser())
            {
                var cultureName = item.Value;
                if (cultureName != CultureInfo.CurrentCulture.Name)
                {
                    await JSRuntime.InvokeVoidAsync(identifier: "$.blazorCulture.set", cultureName);
                    var culture = new CultureInfo(cultureName);
                    CultureInfo.CurrentCulture = culture;
                    CultureInfo.CurrentUICulture = culture;

                    NavigationManager.NavigateTo(NavigationManager.Uri, forceLoad: true);
                }
            }
            else
            {
                // 使用 api 方式 适用于 Server-Side 模式
                if (SelectedCulture != item.Value)
                {
                    var culture = item.Value;
                    var uri = new Uri(NavigationManager.Uri).GetComponents(UriComponents.PathAndQuery, UriFormat.Unescaped);
                    var query = $"?culture={Uri.EscapeDataString(culture)}&redirectUri={Uri.EscapeDataString(uri)}";

                    // use a path that matches your culture redirect controller from the previous steps
                    NavigationManager.NavigateTo("/Culture/SetCulture" + query, forceLoad: true);
                }
            }
        }

        private static string GetDisplayName(CultureInfo culture)
        {
            string? ret;
            if (OperatingSystem.IsBrowser())
            {
                ret = culture.Name switch
                {
                    "zh-CN" => "中文（中国）",
                    "en-US" => "English (United States)",
                    _ => ""
                };
            }
            else
            {
                ret = culture.NativeName;
            }
            return ret;
        }
    }
}
